The midfielder has joined City for the season in a move which reunites him with former Bayern coach Paul Clement, now in charge in south Wales.

Shortly after the deal was sealed Swansea revealed the Premier League rejected a chosen shirt number for their new man, with the Swans' Twitter post stating an application for No 85 was turned down because "squad numbers must be consecutive and close to the current highest number," and Sanches will instead wear the No 35.

But the 20-year-old has started just six Bundesliga games and was made available for loan earlier this summer.

Clement told the Swansea website he had secured "one of Europe's elite young talents", adding: "This move to Swansea and the Premier League will provide him with a real positive development experience.

"As a player he is a dynamic, powerful central midfielder who I believe has all the attributes to suit the Premier League.''

Clement's old Bayern chairman Karl-Heinz Rummenigge said: "We're delighted we've been able to conclude the loan deal with Swansea City. Our goal was for Renato to gain regular match practice at club level in a strong league such as the Premier League.

"We remain convinced he has the potential to become an important player for FC Bayern in the future. For this reason the agreement states that the player will return to FC Bayern on 1 July 2018 with no option to make the transfer permanent."

Swansea announced the news in a tweet showing Sanches in conversation with his Portugal captain Cristiano Ronaldo.